const fs = require('fs')
const path = require('path')
const locales = ['en', 'ja']

const merge = (source, resource, target) => {
    for (let key in source) {
        if (typeof source[key] === 'string') {
            target[key] = resource[key] == void 0 ? source[key] : resource[key]
        } else {
            target[key] = {}
            resource[key] = resource[key] || {}
            merge(source[key], resource[key], target[key])
        }
    }
}

const combine = (source, resource, target) => {
    merge(source, resource, target)
}

function exec() {
    var source = null
    fs.readFile(path.join(__dirname, '..', 'src', 'locales', 'zh.json'), (err, data) => {
        if (err) {
            return
        }
        source = JSON.parse(data.toString())
        fs.writeFile(path.join(__dirname, '..', 'public', '__langs', 'locales', 'zh.json'), JSON.stringify(source, null, 4), () => {})

        locales.forEach(locale => {
            try {
                fs.readFile(path.join(__dirname, '..', 'src', 'locales', locale + '.json'), (err, response) => {
                    fs.readFile(path.join(__dirname, '..', 'src', 'locales', 'zh.json'), (err, data) => {
                        if (err) {
                            return
                        }
                        var target = {}
                        // var source = JSON.parse(data.toString())
                        var resource = JSON.parse(response.toString())
                        combine(source, resource, target)

                        fs.writeFile(path.join(__dirname, '..', 'src', 'locales', locale + '.json'), JSON.stringify(target, null, 4), () => {})
                        fs.writeFile(path.join(__dirname, '..', 'public', '__langs', 'locales', locale + '.json'), JSON.stringify(target, null, 4), () => {})
                    })
                })
            } catch (error) {
                console.log(error)
            }
        })
    })
}
exec()